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Mechanically Actuated Capacitor Microphone Control using MPC and NARMA-L2 Controllers

Mustefa Jibril¹, Messay Tadese², Eliyas Alemayehu Tadese³

¹ Msc, School of Electrical & Computer Engineering, Dire Dawa Institute of Technology, Dire Dawa, Ethiopia

² Msc, School of Electrical & Computer Engineering, Dire Dawa Institute of Technology, Dire Dawa, Ethiopia

³ Msc, Faculty of Electrical & Computer Engineering, Jimma Institute of Technology, Jimma, Ethiopia

mustefa.jibril@ddu.edu.et

Abstract: In this paper, a capacitor microphone system is presented to improve the conversion of mechanical energy to electrical energy using a nonlinear auto regressive moving average-L2 (NARMA-L2) and model predictive control (MPC) controllers for the analysis of the open loop and closed loop system. The open loop system response shows that the output voltage signal need to be improved. The comparison of the closed loop system with the proposed controllers have been analyzed and a promising result have been obtained using Matlab/Simulink.

[Mustefa Jibril, Messay Tadese, Eliyas Alemayehu Tadese. Mechanically Actuated Capacitor Microphone Control using MPC and NARMA-L2 Controllers. Researcher 2021;13(1):1-7]. ISSN 1553-9865 (print); ISSN 2163-8950 (online). http://www.sciencepub.net/researcher. 1. doi:10.7537/marsrsj130121.01.

Keywords: Microphone, Nonlinear auto regressive moving average-L2, Model predictive control

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Comparison of a Triple Inverted Pendulum Stabilization using Optimal Control Technique

Mustefa Jibril ¹, Messay Tadese ², Eliyas Alemayehu Tadese ³

^1. School of Electrical & Computer Engineering, Dire Dawa Institute of Technology, Dire Dawa, Ethiopia

^2. School of Electrical & Computer Engineering, Dire Dawa Institute of Technology, Dire Dawa, Ethiopia

^3. Faculty of Electrical & Computer Engineering, Jimma Institute of Technology, Jimma, Ethiopia 

mustefazinet1981@gmail.com

Abstract: In this paper, modeling design and analysis of a triple inverted pendulum have been done using Matlab/Script toolbox. Since a triple inverted pendulum is highly nonlinear, strongly unstable without using feedback control system. In this paper an optimal control method means a linear quadratic regulator and pole placement controllers are used to stabilize the triple inverted pendulum upside. The impulse response simulation of the open loop system shows us that the pendulum is unstable. The comparison of the closed loop impulse response simulation of the pendulum with LQR and pole placement controllers results that both controllers have stabilized the system but the pendulum with LQR controllers have a high overshoot with long settling time than the pendulum with pole placement controller. Finally the comparison results prove that the pendulum with pole placement controller improve the stability of the system.

[Mustefa Jibril, Messay Tadese, Eliyas Alemayehu Tadese. Comparison of a Triple Inverted Pendulum Stabilization using Optimal Control Technique. Researcher 2021;13(1):8-16]. ISSN 1553-9865 (print); ISSN 2163-8950 (online). http://www.sciencepub.net/researcher. 2. doi:10.7537/marsrsj130121.02.

Keywords: Inverted pendulum, linear quadratic regulator, Pole placement.

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Stability Control of a Rotational Inverted Pendulum using Augmentations with Weighting Functions Based Robust Control System

Mustefa Jibril ¹, Messay Tadese ², Eliyas Alemayehu Tadese ³

^1. School of Electrical & Computer Engineering, Dire Dawa Institute of Technology, Dire Dawa, Ethiopia

^2. School of Electrical & Computer Engineering, Dire Dawa Institute of Technology, Dire Dawa, Ethiopia

^3. Faculty of Electrical & Computer Engineering, Jimma Institute of Technology, Jimma, Ethiopia 

mustefazinet1981@gmail.com

Abstract: This paper mainly analyzes the design and control of the rotational inverted pendulum, and presents a state space expression. Since the system is highly unstable a feedback control system is used. Augmentations with weighting functions based mixed sensitivity and H2 optimal control methods are used to make the system stable for up rise position. The rotational inverted pendulum have been simulated and compared with the proposed controllers and a promising results have been analyzed successfully.

[Mustefa Jibril, Messay Tadese, Eliyas Alemayehu Tadese. Stability Control of a Rotational Inverted Pendulum using Augmentations with Weighting Functions Based Robust Control System. Researcher 2021;13(1):17-21]. ISSN 1553-9865 (print); ISSN 2163-8950 (online). http://www.sciencepub.net/researcher. 3. doi:10.7537/marsrsj130121.03.

Keywords: Inverted pendulum, Augmentation, Mixed sensitivity, H2 optimal

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Loudspeaker Noise Disturbance Control using Optimal and Robust Controllers

Mustefa Jibril¹, Messay Tadese², Fiseha Bogale³

¹ Msc, School of Electrical & Computer Engineering, Dire Dawa Institute of Technology, Dire Dawa, Ethiopia

² Msc, School of Electrical & Computer Engineering, Dire Dawa Institute of Technology, Dire Dawa, Ethiopia

³ Msc, Department of Mechanical Engineering, Kombolcha Institute of Technology, Wollo, Ethiopia

mustefa.jibril@ddu.edu.et

Abstract: Noise reduction is the major issue in the loudspeaker for the application of the musical instruments and related areas. In this paper, a noise disturbance control of a loudspeaker with optimal and robust controllers has been done successfully. The noise of the loudspeaker has been analyzed by simply track a reference cone displacement with the actual cone displacement. Static output feedback and H optimal loop shaping controllers have been used to compare the actual and reference cone displacements by using a sine wave and random cone displacement signals and a promising results have been analyzed.

[Mustefa Jibril, Messay Tadese, Fiseha Bogale. Loudspeaker Noise Disturbance Control using Optimal and Robust Controllers. Researcher 2021;13(1):22-26]. ISSN 1553-9865 (print); ISSN 2163-8950 (online). http://www.sciencepub.net/researcher. 4. doi:10.7537/marsrsj130121.04.

Keywords: Loudspeaker, Cone, Static output feedback, H optimal loop shaping

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Performance Investigation of a Permanent Magnet DC Machines using Robust Control Technique

Mustefa Jibril¹, Messay Tadese², Fiseha Bogale³

¹ Msc, School of Electrical & Computer Engineering, Dire Dawa Institute of Technology, Dire Dawa, Ethiopia

² Msc, School of Electrical & Computer Engineering, Dire Dawa Institute of Technology, Dire Dawa, Ethiopia

³ Msc, Department of Mechanical Engineering, Kombolcha Institute of Technology, Wollo, Ethiopia

mustefa.jibril@ddu.edu.et

Abstract: In this paper, the design and performance investigation of the permanent magnet machines have been done to increase the mechanical and electrical outputs improvement of the systems. A permanent magnet Dc motor (PMDM) and generator (PMDG) have been modelled and designed to improve the angular position and generated current respectively. In this work, augmentation based H 2 optimal and synthesis controllers have been designed as a controller for the two systems and a comparison between the proposed controller for tracking a reference inputs and a promising results have been obtained.

[Mustefa Jibril, Messay Tadese, Fiseha Bogale. Performance Investigation of a Permanent Magnet DC Machines using Robust Control Technique. Researcher 2021;13(1):27-33]. ISSN 1553-9865 (print); ISSN 2163-8950 (online). http://www.sciencepub.net/researcher. 5. doi:10.7537/marsrsj130121.05.

Keywords: Permanent magnet Dc motor, Permanent magnet Dc generator, H 2 optimal controller, synthesis controllers

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Prevalence of Bovine Trypanomosis and Associated Risk Factors in Pawi special District of Benishangul Gumuz region, North Western Ethiopia.

¹ Mohammed Abdulkadir, ^2* Mubarik Kedir, ^3*Haile Worku and ^4* Kedir Yemer

¹ and ^*2 Benishangul Gumuz regional state, Assosa tsetse fly and trypanosomosis control and surveillance center, Asossa, Ethiopia. Email: mubeks@gmail.com and dr.mamedoo@gmail.com

^*3 Benishangul Gumuz regional state, Bureau of Agriculture and Natural Resource, P.O. Box: 30 Assosa, Ethiopia. Email: workuhaile29@gmail.com.

^4* SNNP regional state, Gedeo Zone Livestock and Fishery Office, Dilla, Ethiopia. Email: kedire@gmail.com

Abstract: A cross sectional study was carried out in pawe special district of Benishangul Gumuz Regional State, North West Ethiopia from January to March 2019 to determine the prevalence of trypanosomosis, prevailing species of trypanosomes, associated risks and its vector density. Blood samples collected from 384 randomly sampled cattle (Bos indicus) was examined using parasitological (buffy coat technique) and haematological (Measurement of packed cell volume) procedures. An overall, 10.94% (42/384) prevalence of trypanosomosis was recorded. The infection was caused mainly by Trypanosoma congolense 31/42 (73.8%), Trypanosoma vivax 11/42 (26.8%), and the infection rate was statistically significant among different trypanosome species (P<0.05). Mean packed cell volume (PCV) value of infected animals was lower (19.4 ± 1.3) than non-infected animals (22.03 ± 1.73) and the variation was found statistically significant (P<0.05). Similarly, higher prevalence (17.8%) of trypanosomosis infection was registered in animals with poor body condition when compared to animals with medium (13.46%) and good (4.76%) body condition and the difference was statistically significant (P<0.05). In contrast, prevalence of trypanosomosis was not statistically significant among study sites, age categories and sex groups of study animals (P> 0.05). Glossina morsitans submorsitans, and Glossina tachinoedes were the tsetse fly species caught and their mean apparent density measured as flies/trap/day was 0.78. In addition, other mechanical vectors such as stomoxy and tabanids were captured with flies/trap/day 0.12 and 0.8, respectively. To wrap up, the result of the current finding reveals moderately high prevalence of trypanosomosis in the study district signaling the need for strategic and participatory approach to control the vector and to minimize the impact of the disease in the study district.

[Mohammed Abdulkadir, Mubarik Kedir, Haile Worku and Kedir Yemer. Prevalence of Bovine Trypanomosis and Associated Risk Factors in Pawi special District of Benishangul Gumuz region, North Western Ethiopia. Researcher 2021;13(1):34-40]. ISSN 1553-9865 (print); ISSN 2163-8950 (online). http://www.sciencepub.net/researcher. 6. doi:10.7537/marsrsj130121.06.

Key words: Pawi, Trypanosomosis, Tsetse fly, prevalence, Risk factors.

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Nutritional Quality And Sensory Properties Of Instant Plantain Flake Enriched With Egg Parts

Akinsola, A. O^*, Segilola, V.O., Ayoola, R.B. and Gbadegesin, I.O.

Department of Home Economics, Federal College of Education (Special) Oyo State, Nigeria.

^*Correspondence author: akinsola4gold@gmail.com

Abstract: There is needs to start thinking of producing food products in relation to population census of two decades ago where majority of the populace felt into working class of 25-65 yrs. The study investigated the nutritional quality and sensory properties of instant plantain flakes enriched with different egg parts. Firmly riped plantain pulp was blends with egg-part to give three samples while 100 % whole plantain pulp serves as control. The blends were dried, milled and mixed with other baking ingredients before kneaded, rolled, cut into piece, pressed to 1 mm thick and baked until golden colour was obtained. Proximate composition, minerals and vitamins profile, functional and sensory properties of the instant plantain flakes were determined using standard methods. The result of proximate composition showed that values for moisture content, protein, fat, fibre, ash, carbohydrate and energy ranged from 9.05-18.56, 5.40-12.66, 1.25-5.48, 6.30-6.85, 3.41-4.21, 62.20-66.31 g/100g and 293.17-351.04 kcal/100g respectively. The study revealed improvement in the minerals and vitamins content of the instant plantain flake compare to control sample. Result of functional properties revealed that functional properties of the instant plantain flake improved with different egg-part. Sensory property results showed that Sample D had the highest mean score in terms of taste and overall acceptability than other instant plantain flake samples with a value of 7.63 and 7.52, respectively. It can be deduced based on the study results that acceptable plantain-egg composite flour and its flake can be produced from the blends of plantain and whole egg.

[Akinsola, A. O, Segilola, V.O., Ayoola, R.B. and Gbadegesin, I.O. Nutritional Quality And Sensory Properties Of Instant Plantain Flake Enriched With Egg Parts. Researcher 2021;13(1):41-50]. ISSN 1553-9865 (print); ISSN 2163-8950 (online). http://www.sciencepub.net/researcher. 7. doi:10.7537/marsrsj130121.07.

Keywords: Egg-part, fortification, instant plantain flake, nutritional quality, plantain, population census

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Attempts to Produce Dwarfed Althaea Rosea Plants to Beatify Homes in the winter

Said M. Shahin and Hamdy E.B. Moustafa

Botanical Gards Res. Dept., Hort. Res. Inst., ARC, Giza, Egypt.

Abstract: This study was conducted at the Experimental Nursery of the ornamental Horticulture Department in the tropical farm at Kom Ombo, Hort. Res. Inst., Aswan, Egypt, during 2016/2017 and 2017/2018 seasons to study the effect of different concentrations of cycocel for the production of Althaea rosea plants for house beautification in winter. Significant decrease occurred in most of the vegetative growth characteristics of Althaea rosea plants, such as stem height, number of leaves/ plant, number of flowers/plant, main root length as well as the fresh and dry weight of the leaves, stem and roots, when the plants were treated three times (in the first week of March, April and May) with a cycocel at 1000 to 3000 ppm compared to the control. In regard with stem diameter, leaf area and photosynthetic pigments (chlorophyll a. b, total chlorophylls and total carotenoids), they were greatly increased by the application of cycocel at 1000 to 3000 ppm compared to the control. The promotion was associated with increasing concentrations of cycocel. It can be recommended to spray Althea rosea plants three times with cycocel at 3000 ppm in order to control the vegetative growth to suit House beautification in winter where the plants are integrated and the costs of cutting and pruning are reduced.

[Said M. Shahin and Hamdy E.B. Moustafa. Attempts to Produce Dwarfed Althaea Rosea Plants to Beatify Homes in the winter. Researcher 2021;13(1):51-56]. ISSN 1553-9865 (print); ISSN 2163-8950 (online). http://www.sciencepub.net/researcher. 8. doi:10.7537/marsrsj130121.08.

Keywords: Attempt; Produce; Plant; Beatify; Homes; winter

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Increase of biomass in some aquatic plants grow under stress with using alternative sources of water and use it as contamination indicators

Georgena Wahib Rizk Gabra

Agriculture Research Center, Horticultural Research Institute, Botanical Gardens Department, Antoniades Garden, Alexandria, Egypt.

georgena.rizk@yahoo.com

Abstract: Living organisms are distributed in ideal ecosystems in balanced proportions without prejudice to the existence of each other. The "Eutrophication" phenomena that means biomass aggravation increment of some aquatic plants occurs when increase the dietary excess by organic, inorganic nutrients and elements in waterbodies because of sewage water 'wastewater' leakage into them. These aquatic macrophytes play a major role in conservation of the aquatic ecosystem or even aesthetically for some aquarium, ponds and artificial lakes as a part of the botanical gardens, water parks, fish farms and it may spread a lot in slowly flowing canals and rivers. The purpose of this study is to estimate the rates of increase in plants biomass produced under stress of using alternative water sources. Also, using these macrophytes as contamination biomarkers and in phyto-remediation process and what’s for/on it and its impact in/on its presence in fresh water bodies. The most important of these macrophytes are Pistia stratiotes "water lettuce" as floating plant and Ceratophyllum demersum as submerged one. The experiment was carried out in open field of El- Harrery village, El Montaza, at the east of Alexandria, Egypt, during two successive summer seasons 2014 & 2015 for 28, 34 days for each plant respectively. The plant samples were obtained from the National Center for Oceanography and Fisheries, El- Anfoushi, Quiet Bay, Alexandria, Egypt. The means of initial weights of plants were average at 47g and 32g wet weight for each plant respectively. The treatments media were Tap Water as a control [TW] - Primary Treated Domestic Wastewater [PTW 15%, 25%] - Ground Well Water [GWW 15%, 25%] - Mix 15%, 25% [TW+PTW+GWW] from full volume 2.5 L of plastic Jars. The treatments were increased by the same concentration when the water evaporated. The results reached to highly significant differences between treatments in vegetative growth parameters, chemical constituents [total chlorophyll, N, P, K in plants tissues]and Na, Cd and Pb in plants treated with PTW 25%, sediment determination and water quality tests [color and turbidity] before and after the same treatment. The treatment of PTW 25% proved its superiority in most vegetative growth parameters in both plants, but it caused that the fastest growing and the most degraded in water lettuce plant. Thus, it can be recommended that these plants can be released as pollution indicators and monitored in their environment and use this in phytoremediation process.

[Georgena Wahib Rizk Gabra Increase of biomass in some aquatic plants grow under stress with using alternative sources of water and use it as contamination indicators 2021;13(1):57-67]. ISSN 1553-9865 (print); ISSN 2163-8950 (online).http://www.sciencepub.net/researcher 9. doi:10.7537/marsrsj130121.09.

Keywords: Phytoremediation – Biomarkers – Eutrophication – Macrophytes – Ecosystem

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